BQ24152 Datasheet, PDF (26/38 Pages) Texas Instruments – Fully Integrated Switch-Mode One-Cell Li-Ion Charger with Full USB Compliance and USB-OTG Support

bq24152
SLUS847 – JUNE 2008 ...................................................................................................................................................................................................... www.ti.com
The slave address byte is the first byte received following the START condition from the master device. The
address bits are factory preset to ‘1101011’.
Register Address Byte
MSB
LSB
0
0
0
0
0
D2
D1
D0
Following the successful acknowledgment of the slave address, the bus master will send a byte to the bq24152,
which contains the address of the register to be accessed. The bq24152 contains five 8-bit registers accessible
via a bidirectional I²C-bus interface. Among them, four internal registers have read and write access; and one
has only read access.
I²C INTERFACE TIMING CHARACTERISTICS
SYMBOL
PARAMETER
TEST CONDITIONS
MIN
Standard mode
Fast mode
High-speed mode (write operation)
CB - 100 pF max
f_SCL
SCL clock frequency
High-speed mode (read operation)
CB - 100 pF max
High-speed mode (write operation)
CB - 400 pF max
High-speed mode (read operation)
CB - 400 pF max
t_BUF
Bus free time between a STOP and ^{Standard mode}
START condition
Fast mode
4.7
1.3
Standard mode
4
t_HD; t_STA
Hold time (repeated) START
condition
Fast mode
600
High-speed mode
160
Standard mode
4.7
t_LOW
LOW period of the SCL clock
Fast mode
1.3
High-speed mode, C_B – 100 pF max
160
High-speed mode, C_B – 400 pF max
320
Standard mode
4
t_HIGH
HIGH period of the SCL clock
Fast mode
600
High-speed mode, C_B – 100 pF max
60
High-speed mode, C_B – 400 pF max
120
Standard mode
4.7
t_SU; t_STA
Setup time for a repeated START
condition
Fast mode
600
High-speed mode
160
Standard mode
250
t_SU; t_DAT Data setup time
Fast mode
100
High-speed mode
10
Standard mode
t_HD; t_DAT Data hold time
Fast mode
High-speed mode, C_B – 100 pF max
High-speed mode, C_B – 400 pF max
TYP
MAX
100
400
3.4
2
1.7
2
UNIT
kHz
kHz
MHz
µs
µs
ns
µs
ns
µs
ns
µs
ns
ns
3.45
µs
0.9
70
ns
150
26
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